- Geological Survey (U.S.)37
- National Atlas of the United States35
- Arndt, Raymond E.10
- Bawiec, Walter J.10
- Beikman, Helen M.10
- Instituto Nacional de Estadística, Geografía e Informática (Mexico)10
- King, Philip B.10
- National Geophysical Data Center10
- Schruben, Paul G.10
- Geological Survey (U.S.) Minerals Information Team9
- Canada Centre for Remote Sensing8
- Bush, Charles A.5
- Reed, John Calvin, Jr. 1930-5
- Godt, Jonathan W.3
- Canada Centre for Mapping2
- Blackburn, Laura1
- Eastern Energy Resource Surveys Team (Geological Survey)1
- Geological Survey (U.S.). Water Resources Division. Wisconsin District1
- Lannoo, Michael J.1
- Nanjappa, Priya1
